Grammar: Should, ought to, had better and be supposed to
Introduction
Should and ought to
We use should and ought to say what is the best thing or the right thing to do.
There is no difference in meaning.
You are not very well. Perhaps you should see a doctor.
Your uncle was very kind to me. I ought to write him a letter of thanks.
People shouldn’t break / oughtn’t to break their promises.
We can also use should and ought to in questions to ask for advice
Where should I put this picture, do you think?
It’s a difficult problem. How ought we to deal with it.
Had better
We use had better to say what is the best thing to do in a situation.
It’s cold. The children had better wear their coats.
The neighbors are complaining. We’d better turn the music down.
Be supposed to
We use be supposed to:
The guests are supposed to buy flowers for the hostess.
Look at these cars. This area is supposed to be kept clear of traffic.
The bus driver needs to concentrate. You are not supposed to talk to him.
We can use was/were supposed to for the past:
It’s eleven o’clock. You were supposed to be here at ten thirty, you know.
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